Jeff Sutherland et al.: Scrum Essentials Cards: Experiences of Scrum Teams Improving with Essence. (2020) journals/queue/SutherlandJK20 10.1145/3411757.3418775 Q110565887 Scrum Essentials Cards: Experiences of Scrum Teams Improving with Essence. 3 Jeff Sutherland 1 Ivar Jacobson 2 Brian Kerr 3 83-106 ACM Queue ACM Queue 18 3 2020